Low cycle fatigue and creep-fatigue behavior of Ni-based alloy 230 at 850°C

Xiang Chen; Zhiqing Yang; Mikhail A. Sokolov; Donald L. Erdman; Kun Mo; James F. Stubbins

doi:10.1016/j.msea.2012.11.063

Low cycle fatigue and creep-fatigue behavior of Ni-based alloy 230 at 850°C

Xiang Chen, Zhiqing Yang, Mikhail A. Sokolov, Donald L. Erdman, Kun Mo, James F. Stubbins

Advanced Nuclear Materials

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Strain-controlled low cycle fatigue (LCF) and creep-fatigue testing of Ni-based alloy 230 were carried out at 850. °C. The material creep-fatigue life decreased compared with its low cycle fatigue life at the same total strain range. Longer hold time at peak tensile strain further reduced the material creep-fatigue life. Based on the electron backscatter diffraction, a novel material deformation characterization method was applied, which revealed that in low cycle fatigue testing as the total strain range increased, the deformation was segregated to grain boundaries since the test temperature was higher than the material equicohesive temperature and grain boundaries became weaker regions compared with grains. Creep-fatigue tests enhanced the localized deformation, resulting in material interior intergranular cracking, and accelerated material damage. Precipitation in alloy 230 helped slip dispersion, favorable for fatigue property, but grain boundary cellular precipitates formed after material exposure to the elevated temperature had a deleterious effect on the material low cycle fatigue and creep-fatigue property.

Original language	English
Pages (from-to)	152-162
Number of pages	11
Journal	Materials Science and Engineering: A
Volume	563
DOIs	https://doi.org/10.1016/j.msea.2012.11.063
State	Published - Feb 15 2013

Funding

The work was supported by the U.S. Department of Energy grants DE-FC07-07ID14819 and NEUP 09–516 . Z.Q. Yang was supported partially by NSFC 51171189 . The microanalysis was carried out in the Shared Research Equipment User Facility at Oak Ridge National Laboratory which is supported by the Scientific User Facilities Division of the Office of Science, U.S. Department of Energy. The authors are thankful for Dr. Henry White from Haynes International Inc. for providing test materials. The authors also would like to thank Christopher Stevens and Eric Manneschmidt from Oak Ridge National Laboratory for their technical support.

Funders	Funder number
U.S. Department of Energy	DE-FC07-07ID14819, NEUP 09–516
Office of Science
National Natural Science Foundation of China	51171189

Keywords

Creep-fatigue
EBSD
Failure
High-temperature deformation
Nickel based superalloys
Precipitation

Access to Document

10.1016/j.msea.2012.11.063

Cite this

@article{c09bc012859b40d2bf822c17fc1d5a2e,

title = "Low cycle fatigue and creep-fatigue behavior of Ni-based alloy 230 at 850°C",

abstract = "Strain-controlled low cycle fatigue (LCF) and creep-fatigue testing of Ni-based alloy 230 were carried out at 850. °C. The material creep-fatigue life decreased compared with its low cycle fatigue life at the same total strain range. Longer hold time at peak tensile strain further reduced the material creep-fatigue life. Based on the electron backscatter diffraction, a novel material deformation characterization method was applied, which revealed that in low cycle fatigue testing as the total strain range increased, the deformation was segregated to grain boundaries since the test temperature was higher than the material equicohesive temperature and grain boundaries became weaker regions compared with grains. Creep-fatigue tests enhanced the localized deformation, resulting in material interior intergranular cracking, and accelerated material damage. Precipitation in alloy 230 helped slip dispersion, favorable for fatigue property, but grain boundary cellular precipitates formed after material exposure to the elevated temperature had a deleterious effect on the material low cycle fatigue and creep-fatigue property.",

keywords = "Creep-fatigue, EBSD, Failure, High-temperature deformation, Nickel based superalloys, Precipitation",

author = "Xiang Chen and Zhiqing Yang and Sokolov, {Mikhail A.} and Erdman, {Donald L.} and Kun Mo and Stubbins, {James F.}",

year = "2013",

month = feb,

day = "15",

doi = "10.1016/j.msea.2012.11.063",

language = "English",

volume = "563",

pages = "152--162",

journal = "Materials Science and Engineering: A",

issn = "0921-5093",

publisher = "Elsevier",

}

TY - JOUR

T1 - Low cycle fatigue and creep-fatigue behavior of Ni-based alloy 230 at 850°C

AU - Chen, Xiang

AU - Yang, Zhiqing

AU - Sokolov, Mikhail A.

AU - Erdman, Donald L.

AU - Mo, Kun

AU - Stubbins, James F.

PY - 2013/2/15

Y1 - 2013/2/15

N2 - Strain-controlled low cycle fatigue (LCF) and creep-fatigue testing of Ni-based alloy 230 were carried out at 850. °C. The material creep-fatigue life decreased compared with its low cycle fatigue life at the same total strain range. Longer hold time at peak tensile strain further reduced the material creep-fatigue life. Based on the electron backscatter diffraction, a novel material deformation characterization method was applied, which revealed that in low cycle fatigue testing as the total strain range increased, the deformation was segregated to grain boundaries since the test temperature was higher than the material equicohesive temperature and grain boundaries became weaker regions compared with grains. Creep-fatigue tests enhanced the localized deformation, resulting in material interior intergranular cracking, and accelerated material damage. Precipitation in alloy 230 helped slip dispersion, favorable for fatigue property, but grain boundary cellular precipitates formed after material exposure to the elevated temperature had a deleterious effect on the material low cycle fatigue and creep-fatigue property.

AB - Strain-controlled low cycle fatigue (LCF) and creep-fatigue testing of Ni-based alloy 230 were carried out at 850. °C. The material creep-fatigue life decreased compared with its low cycle fatigue life at the same total strain range. Longer hold time at peak tensile strain further reduced the material creep-fatigue life. Based on the electron backscatter diffraction, a novel material deformation characterization method was applied, which revealed that in low cycle fatigue testing as the total strain range increased, the deformation was segregated to grain boundaries since the test temperature was higher than the material equicohesive temperature and grain boundaries became weaker regions compared with grains. Creep-fatigue tests enhanced the localized deformation, resulting in material interior intergranular cracking, and accelerated material damage. Precipitation in alloy 230 helped slip dispersion, favorable for fatigue property, but grain boundary cellular precipitates formed after material exposure to the elevated temperature had a deleterious effect on the material low cycle fatigue and creep-fatigue property.

KW - Creep-fatigue

KW - EBSD

KW - Failure

KW - High-temperature deformation

KW - Nickel based superalloys

KW - Precipitation

UR - http://www.scopus.com/inward/record.url?scp=84870781541&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2012.11.063

DO - 10.1016/j.msea.2012.11.063

M3 - Article

AN - SCOPUS:84870781541

SN - 0921-5093

VL - 563

SP - 152

EP - 162

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

ER -

Low cycle fatigue and creep-fatigue behavior of Ni-based alloy 230 at 850°C

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this